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基于模糊多属性决策法建立了真空联合堆载预压法加固软土地基效果评价模型。选择总沉降、固结度、抗剪强度和侧向位移等4种监测变量作为加固效果评价的影响因素,采用模糊多属性决策方法,对软基加固效果的指标值和权值进行分析计算,确定出其效果评价的模糊指标值和模糊权值,并通过差异度分析和模糊效用值分析与常规堆载预压法进行对比,研究二者的加固效果随时间的变化关系。通过真空联合堆载预压法在广东西部沿海高速公路台山段路基加固工程中的应用,有效地论证了的该法的优势。
Based on the fuzzy multi-attribute decision-making method, the effect model of vacuum combined with surcharge preloading method to reinforce soft soil foundation was established. Four monitoring variables such as total settlement, degree of consolidation, shear strength and lateral displacement were selected as the influencing factors for the reinforcement effect evaluation. The fuzzy multi-attribute decision-making method was used to analyze and calculate the index value and weight of the reinforcement effect. The fuzzy index value and fuzzy weight value of its effect evaluation were determined, and compared with the conventional preloading method by the analysis of variance and fuzzy utility value analysis to study the relationship between the reinforcement effect and the time. The application of vacuum preloading combined with surcharge method in the reinforcement of the subgrade in Taishan section of the western coastal expressway in Guangdong has effectively demonstrated the advantages of this method.